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G. A. BAUER.

EYEGLASS MOUNTING.

APPLICATlON ms!) JULY 12, :915.v

lllmv@mt@rs Patented Aug. 1, 1916.

.EYEGLASS-MOUNTING.

Specification of Letters Patent.

Patented Aug. 1, rain.

Application filed July 12, 1915. Serial No. 39,421.

To all whom it may concern:

Be it known that I, GUSTAV -A. BAUER, a citizen .of the United States, and resident of Rochester, in the county of 'Monroe and State of New York, have invented certain new and useful Improvements in Eyeglass- Mountings, of which the following is a specification.

This invention relates to eyeglass-mountings of, the type in which the nose-clamps or guards are carriedby spring-controlled levers, which are pivoted at the ends of a rigid bridge and are actuated by finger-pieces at the front of the mounting.

The object of the invention is to improve the construction of eyeglass-mountings, of

the type in question, with respect to the manner in which the pivots of the nose-clamp levers are formed and are secured in place, the improvement having reference particularly to facilitating the removal and replacement of the pivots when necessary, and the security of the pivots against rotation in the bridge when in use.

In eyeglass-mountings of the type in question, as ordinarily constructed, the pivots are secured in place either by tight fitting,

riveting, or other means which cause their connection with the bridge to be practically permanent, or, where removability is desir able, by screwing them into the bridge. Where the pivots are secured in the latter mannenhowever, they tend to become loosened in the use of the eyeglasses, so that it is common to more or less upset the ends of the pivots to prevent-them from unscrewing. This operation, however, practically defeats the object in view in making the pivots to screw. into the bridge, for the reason that when a pivot so upset is unscrewed from the bridge it enlarges the screwthreaded opening. and injures the threads, so that they will not hold the pivot as tightly as before. Furthermore, the screw-threaded attachment of the pivot is not well adapted for use where the pivot-stud is employed not only to secure the nose-clamp lever in place, but also as a support and an anchorage for a spiral spring by which the lever is controlled. In such a case it is necessary to have th pivot-stud very securely fixed,

against rotation in the'bridge, and consequently it has been customary to employ, in such cases, some construction in which the stud is permanently secured to the bridge.

In accordance with the present invention I employ a construction which renders it impossible for the pivot-stud to rotate in the bridge. and which secures the stud effectively against loosening when the mounting is in use, but which at the same time permits the stud to be readily removed and replaced as often as niay be desirable, without any responding form. The stud is provided with shoulders adapted to engage one surface, usually the upper surface, of the bridge, and the stud is secured in place by a screw which is threaded into the shank of the stud, and

of which the head engages the opposite surface of the bridge. When the screw is tightened the stud is held securely against both rotative and lateral movement, and it may thus be conveniently used not only as a pivot for the lever, but also as a support and anchorage for the spring, but whenever it is necessary to remove the stud this may be easily done by removing the screw from the stud, and withdrawing the stud from the bridge,

In the accompanying drawings: Figure l is a plan-view of a part of an eyeglassmounting, embodying the present invention, on a greatly enlarged scale; Fig. 2 is a rearelevation of the same part; Fig. 3 is a vertical section on theline 3-3 in Fig. 2, but on a larger scale; Fig. 4 is a plan-view showing, in detail, one end of the bridge of the mounting; and Fig. 5 is a perspective view of the pivot-stud.

The invention is illustrated as embodied in an eyeglass-mounting in which each lens 10 is fixed in the usual lens-clip 11, this clip being fixed to one end of a rigid bridge 12. The bridge has a bearingportion 13, with flat upper and lower surfaces, and the nose clamp lever '14 is seated on the upper sur-v face of this bearing-portion and is provided, at its forward end, with the usual finger-piece 15. The lever is controlled by a spiral spring 16, of which the outer end 17 engages the lever.

The bridge is provided, as shown in Fig.

4, with an opening 18 which is non-circular in form, and this opening closely fits the shank 19 of the pivot-stud. This shank has two opposite flattened surfaces, as shown in Fig. 5, which terminate in shoulders 20, and above these shoulders is a flange 21. the stud is" introduced in the bridge, with the shoulders 20 resting against the upper surface of the latter, the flange 21 is thereby spaced from the bridge a suiiicient distance to admit the thickness of the nose-clamp lever 14, and permit the latter to turn freely aboutthe stud while confining it against vertical. movement. To provide for the support of the spring 16 the stud is extended upwardly, in the form of a springpost 22 which is transversely cleft to receive the inner straight end 23 of the spring, the spring being thus anchored against rotation on the post. After the introduction of the spring the upper extremity of the post may be upset or headed, to provide a fiange 24: which engages the innermost coil of the spring and thus confines the spring on the post.

The pivot-stud is secured in place by a screw 25 which is threaded into the lowerendof the shank 19, as shown in Fig. 3, and this screw draws the stud downwardly so that the shoulders 20 are in firm engagement with the upper surface of the bridge. Since the fitting of the shank 19 in the hole 18 prevents any rotation of the stud, the screw 25 does not tend to become loosened in the use of the eyeglasses, notwithstanding the fact that the stud is used as a support and anchorage for the spring.

Although the pivot-stud above described has been shown in connection with a lens clip of the usual form, it is particularly useful in connection with mountings of the type in which the lenses are cemented into the clips. In the use of such mountings it is necessary to heat them in order to melt the When cement which is used, and where the noseclamps are pr0vided,' as'is common, with facings of combustible material, it is desirable to remove the noserclamps from the mounting before heating it. It is also desirable to remove the springs in order that their temper may not be drawn by the heating operation. The present construction permits the springs and the nose-clamp 1evers, with the nose-clamps carried thereby, to be all removed at once by the simple operation of removing the studs by which these parts are secured to the bridge. It is also.

In an eye-glass mounting, the combination with a bridge provided with a non-circular opening and a Hat surface surrounding the opening, of a pivot stud comprising a portion fitting in and conforming to the non-circular opening, a cylindrical bearing portion, a shoulder at the junction of the bearing portion with the non-circular portion, said shoulder engaging the fiat surface on the bridge, and a flange spaced from. said flat surface; a screw engaging the post and the bridge and holding the shoulder against the flat surface. a nose-clamp lever pivoted to the stud and engaging the flange and the fiat surface on the bridge; and a spring secured at one end to the stud and at the "other end to the nose clamp lever.

' GUSTAV A. BADER. 

